I fixed certain part of molecular model using: “fix 1 surface setforce 0.0 0.0 0.0”
And then I assigned initial velocity on the fixed part using: “velocity surface create 300.00 1265991662 mom yes rot yes dist gaussian” and run NVT simulation.
For this case, the initial velocity will be kept on the fixed part?
I checked that the initial velocity of the fixed part is not changed during simulation from the velocity dump file & also the position of the fixed part is not changed, too.
Since velocity is the rate of change of positions, I just wonder why the initial velocity is conserved during simulation even position is not changed.
I’d very much appreciate, if you give a comment on that.